Primary battery.



PRIMARY BATTERY. v APPLIO'ATIOF FILED HAB. 20,

4 Patented sept. 29, 1908.

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/A/ VEA/70)? I ST..

ns ariane irren PRIMARY BATTERY.

'1'0 all whom it may concern.'

Be it known that l, WiLiiniLii Fenix Birnen, a citizen of Specification of Letters Patent.

Application filed March 20. 1908. Serial No. 422,324.

Patented Sept. 29, 1908.

l with a flange to sit upon and joint with the ALEXANDER l nei-.ltv of the vessel A. Australia residl bon c rliiidei' is )rel'ei'ablv )erioratcd with 4 l l l ing at 284 and 286 Queen street, Brisbane, iii f the State oiY Queensland, Commonwealth of Australia, electrician, have invented new and of which the following is a specification.

`My invention relates to iiiiproved double iluid primary batteries consisting essentially Ihe solution of the excitant is inade up by dissolving commercial sodium hydroxid in water-in the proportion of about one aijt by weight of the hydroxid to two arts o water. I make up iny depolarizing soliitions by dissolving chroniic acid inan aqueous solution of hydrogen ieroxid (IB02) and adding thereto hydrochloric acid (llCl). Iiind that very good results are obtained by using coinmercial cliroinic acid of good quality, 3% solution -of li drogen peroxid and coniiiicrcial hydrochloric acid in 'the following proportions:-chromic acid 5 ounces by weight. Hydrogen peroxid (3% solution) 1() ounces by measure. I-Iydrocliloric acid 5 ounces by measure. I must not, however, be taken as tying myself down to these proportions, as I iind that goed results are obtainable even when a wide departure is made therefrom.

In reparing niy depolarizer I irst dissolve a litt e of the clironiic acid in a solution of hydrogen peroxid and hydrochloric acid whereupon a violent reaction takes place but at once subsides, and the remainder of chromic acid may be added without any further effervescence taking place.

In order that my' invention may la@ thoroughly understood, I will now describa-by reference to thoacconipanying drawin a convenient form invwhic my lmproved at- 4teries may be put up.

-Figure 1 in the drawing is a sectional illustration in which A is. the outer containing vessel, made-'of glass, oelluloid, or other suitable material. B is the carbon element, which is preferably inade cylindrical in forni,

Without ,bottoni and provided at the top4 usel'ul Improvements in Primary Batteries,

The wall of the carsinall holes where iiiiiiiersed in the depolarizer, so as to facilitateI the circulation of the s'oliitioin (I is the porous pot inade in the usual way, but preferably extending u wards suiliciently to joint with the cover D is the zinc element, of cruciforin or other section affording a large surface, and is placed centrally iii the porous pot C. The top and bottoni of the porous pot are dipped for a short distance in inelted parailin wax. The carbon B and zinc D are provided 'with terminals as shown in the drawing for the purpose of'inaking connections.

In making up a cell, the depolarizing solutions already described is placed in the vessel A. The carbon cylinder E is next put in place, after which the porous pot C is introduced and the excitant solution poured in- .side it.

The zinc D is then inserted-in the excitant and the cover E put on, so as to niakc a dust-proof joint with the pot C and [lange of the carbon B. 1

Cells made up as above described yield a high voltage and are of low internal resistance. lThey are readily kept in working con- -dition by renewing the excitant sodiuin hydroxid solution from tinie to tiine until the de olarizing solution becoines exhausted. W ien this happens afresh depolarizing solution is iliade up and substituted for the exhausted solution. r

4Batteries of this kiiiil,`wlietlier on closed. or open circuit, are almost entirely free frein noxious or objectionable fiiiiies or gases, are particularly useful and ellicient, since, in ad- .dition to their high electroinotivc force and low internal resistance, they possess a remarkable constancy which enables them to be employed with advantage in many cases where the ordinary primary batteries are unsuitable.

What I claim is 1. In primary batteries of the double. Huid type the combination of sodium hydroxid as excitant with ay depolarizer consisting of chroinic ac'id dissolved in a solution of hydrogen eroxid with the addition oi hydrocliloricacid as described.`

2. A donblefiluid priniary battery consisting essentially oi' zinc as the positive element in a solution oi sodium liydroxid 'as the excitant aiid of carbon iis the negative eleineiit iiov by a porous partition substantially as dein a dopoarizer consisting of ohiomic acid name to this Speoiication in the. presence oi dissolved in a` solution of hydrogen peroxid l two-subscribingwitnesses. with the addition of hydrochloric acid, the i 1, r u f 1 I 4 f A dopoizmzorboingsepaiated from the excitant-l I HHLI'M ALLXAMM" umu BLM Ck Witrnescs:

scibod. CHARLES S. i/VERNAP,

n testlmony ,whereof I, have signed my ALEXANDER ANDERSON. 

